Automatic operating device for embroidery machines



Feb. 12' 1924. 1,483,168

0. FAHRNI AUTOMATIC OPERATING DEVICE FOR EMBROIDERY MACHINES Filed April15, 1918 6 Sheets-Sheet 1 Feb. 12 1924.

O. FAHRNI AUTOMATIC OP ERATING DEVICE FOR EMBROIDERY MACHINES 6 Shsets-She et 2 Filed April 15, 1918 mm, m

Feb. 12

O. FAHRNI AUTOMATIC OPERATING DEVICE FOR EMBROIDERY. MACHINES 1918 I 6Sheets-Sheet 5 Filed April 15 Feb. 12 1924. 1,483,168

o. FAHRNl AUTOMATIC OPERATING DEVICE FOR EMBROIDERY MACHINES Filed April15, 1918 6 SheetS SheGt Feb. 12' 1924. 1,483,168 O. FAHRNI AUTOMATICOPERATING DEVICE FOR EMBROLIDERY MACHINES.

I Filed April 15, 1918 6 Sheets$heet 5 FebQ12Q1924. I 1,483,168

O.FAHRN| AUTOMATIC OPERATING DEVICE FOR EMBROIDERY MACHINES Filed April15. "1918 6 Sheets-Shem 6 fly/9. 2a @4 1 @uzz.

" @zy @yw Patented Feb. 12, 1924.

UNETED STATES PATENT orrics.

OTTO FAHRNI, OF BLUIVILIIVIATT, NEAR THUN, SWITZERLAND, ASSIGNOR TOGOTTLIEB RIESER AND LEOPOLD WYLEE, BOTH 0F BERNE, SWITZERLAND.

AUTOMATIC OPERATING DEVICE FOR EMBROIDERY MACHINES.

Application filed April 15, 1918. Serial No. 228,572.

T 0 all whom it may concern Be it known that I, Or'ro FAHRNI, a citizenof the Swiss Confederation, and residing at Blumlimatt, near Thun,Switzerland, have invented certain new and useful Improvements inAutomatic Operating Devices for Embroidery Machines, of which thefollowing is a specification.

This invention relates to improvements in embroidery machines andparticularly to improvements in automatic operating devices forembroidery machines in which the simultaneous vertical and horizontaldisplacements of the frame that jointly determine the movement (orshifting) of the frame, are regulated for each stitch by means of holesformed in a perforated pattern strip. This invention will be understoodfrom the embodiment thereof herein after particularly described andcomprising a lever to which is attached a rack serving indirectly toactuate the frame and which, through the intermediary of a series oftwoarmed levers (or bell-cranks) is so connected with a series of crankshaving different lengths and adjustable independently of one another intwo positions opposite one to the other, that each crank exerts orproduces upon the rack a shifting (ordisplacement) thereof correspondingto the throw of the crank.

In the drawings illustrating the principle of this invention and thebest mode now known to me of applying that principle,

Fig. 1 is a top view from the upper half of which the topmost part ofthe driving mechanism is omitted. Fig. 2 is a side elevation, in whichsome parts are shown in section. Figs. 3 and .4 are diagrammatic viewsof certain details hereinafter referred to. Fig. 5 is a detailillustrating parts shown in Fig. 2. Fig. 6 is an end elevation viewedfrom the left-hand side of Fig. 2. Figs. 7 to 11 and Figs. 13 and letillustrate details hereinafter described. Fig. 12 and Figs. 15 to 29 areworking diagrams hereinafter explained.

A grooved disk 4, keyed upon the main or driving shaft 1 that revolvesin the direction indicated by the arrow shown in Fig. 2 and that isjou-rnaled in the lower part of the machine-frame 2, 3, is engaged bythe roller 5 mounted on a lever 7, which is fulcrumed at one end, as isshown at 6, and the other end of which is connected, by means of alink-rod 8, with one arm 9 of a bell-crank lever, of which the other armis indicated by 10. This bell-crank lever is mounted fast on the shaft11, which is j ournaled in the upper part 3 of the machine-frame. To thearm 10 of the bell-crank lever, there is pivotally connected one end ofa link 12, the other end of which is coupled, in a manner that will beexplained hereinafter, with two toothed racks 13, 14:, arranged parallelto and'at a distance from each. other. The racks 13, 1 1, arelongitudinally slidable in grooves formed in the supports 15, 16 androllers 17 (Figs. 1 and 6). Either of the racks 13, 14, may be moved, bymeans of the link 12, to and fro for the same distance and to such anextent that pinions meshing with the racks 13, 14:, will be revolvedhalf a turn in either one or the other of two opposite directions. Therack 13 meshes with six pinions marked 18 and with two pinions 19, 21,having equal diameters. All these pinions just named rotate idly, andare mounted free to slide axially, upon the shafts 24$, 24*, 2422 1, 2424, 24?, 2 1, respectively, which are arranged crosswise and parallel toone another in the bearings 22, 23, and perpendicular to and above eachof the racks 13, 14. Each of the shafts just named is provided with acrank.

From a lateral face of each pinion 18, there extends laterally anelongated hub in which there is formed an annular groove in whichengages a slide 25 that is mounted on the lower end of thedownwardly-projecting arm 26 of a bell-crank lever, the other arm ofwhich is marked 26 (Fig. 11'). The end-face of each elongated hubcarries -a dog or catch 27 (Fig. 12) and the opposite face of the pinion18 is provided with a dog or catch 28 (Figs. 11 and 12), which is inexact axial alinement with the dog 27. Both th catches 27, 28, have theform of quadranbshaped segments (Figs. 2 and 12) and engage and serve ascarriers for the collars or sleeves 29, 30, respectively, which are faston the shaft on which the pinion 18 is idly mounted. These sleeves 29,30, are formed'with dogs or teeth 29*, 30 respectively, which, liketheir co-acting catches 27, 28, are quadrant-shaped segments (Fig. 12).The tooth 29 is displaced from the tooth 30 by an angle of one hundredand eighty degrees (180).

Let it be assumed that the pinion 18 is so adjusted, on its shaft, thatits dog or catch 27 lies in advance of or underneath the tooth or dog 29of the sleeve 29 (see I, Fig. 12); it is obvious that the shaft will notbe rotated, if the pinion 18 be given half a turn clockwise. If,however, owing to the operation of a perforated patternstrip acting in amanner that will be explained hereinafter, the pinion 18 is shiftedaxially along the shaft, until the dog 28 of the pinion 18 is throwninto engagement with the dog fast on the sleeve 30, the latter dog beingin advance of the dog 28, the sleeve 30 and its shaft will be carriedthrough an angular displacement of one hundred and eighty degrees (180)by giving the pinion half a turn clockwise (or in the direction of thearrow in Fig. 12) and will assume the working position marked II in Fig.12. During the idle movement of the rack 13 (Figs. 1, 2), the dog 28 isrotated half a turn counter-clockwise and the shaft is left in itsworking position, in which thecrankpoints downwards (see III, Fig. 12).If the pinion 18-be shiftedagain axially along the shaft, but'in anopposite direction, the dog 27 will en age .with the dog 29 as isillustrated at I Fig. 12, while the dog 28 will become disengaged fromthe dog 3tl and will assume a position alongside the latter. At the nextworking rotation of the pinion 18 in the direction of the arrow shown inFig. 12, the dog or tooth 27 of the pinion 18 will engage the dog 29 ofthe collar or sleeve 29, and the shaft on which the collar and thepinion are mounted will consequently be turned and the crank of thatshaft will again assume its upright position (see I, Fig. 12).

Each of the cranks of the shafts 24*. 24, 24, 24, 24 24 24 24*, is, by alink 31, connected to an end of one of the twoarmed double-levers 32,33, 34, 35, 36, re spectively (Figs. 1, 2, 5). The levers 32, 35, havearms of equal length, while the lengths of the arms of the other levers33, 34, 36, are in the ratio of 1:2. By means of pivot-pins, the levers32, 35, are fulcrumed, at their mid-points,on the free ends of thelonger arms of the levers 33, 34, respectively. The latter levers 33,34, are fulcrumed on pivot-pins carried by the free ends of two parallellevers 38, which lie adjacent to but spaced from each other (Fig. 1) andare mounted fast upon the same fulcrum-shaft or common axis 37. Thearrangement of the levers 32 and 35 and of the levers 33 and 341ssymmetrical with regard to the shaft 37. This fulcrumshaft 37 1sjournaled between the adj acentlylying free ends of the longer arms of apair of two-armed levers 39, the ratio of the lengths of thearms of.which is as one is to two. Lever 36 is fulcrumed between the ad jacently-lying free ends of the shorter arms of these two-armed levers39, the fulcrumshaft or axis of which is marked 40. Pivoted on thetrunnion or shaft 40 is a rack 41, which will be called hereinafter thedriving rack in order to distinguish the same from a rack 42 pivoted onthe fulcrum or shaft 37. The rack 42 serves to ensure a positiveconnection between the frame and the cranks, when the rack 41 is out ofengagement with the gear 43. In order to cause the frame to be shifted,the driving rack 41 is positively connected with or geared to ahorizontal rack 44 by means of a gear 43 of double width (F igS. 1, 2,4), which meshes with both racks 41, 44, and which is connected, in amanner not shown, with the frame of an embroidery machine. With the rack44, there also meshes a pinion 45 mounted co-axially and connected witha pinion 46, which is located, closely adjacent to the rack 44, in thesame vertical plane as the rack 42. The diameters of the pinions 45, 46,are in the same ratio toeach other as the lengths of the arms of thetwoarmed levers 39, to-wit, as one is to two. The pitch of the rack 44corresponds exactly to an assumed displacement of the frame by the crankof the shaft 24 of, say, five millimeters. The crank of the shaft 24 is,at points in the description that follows hereinafter, referred to asthe five-millimeter crank. These five millimeters represent, in theworking example shown, a unit for the shiftingmovement of the frame. Thethrows of the cranks of the six shafts 24, 24 24, 24, 24, 24 as regardsthe lengths of their arms or lifts,

are, respectively, in such a ratio to the throw of the crank of theshaft 24 that they will produce, by means of the respective transmittinglevers, displacements of the frame amounting to one sixtieth or to anumber of or several sixtieths of the unit just mentioned.= For examplc,let it be supposed that the distance between the dead point positions ofthe crank of the shaft- 24 be 6 millimeters; of the crank of the shaft24 be 3 millimeters; of the crank of the shaft 24" be 22.5 millimeters;of the crank cf the shaft 24 be 11.25 millimeters; of the crank of theshaft 24 be 24 millimeters; of the crank of the shaft 24. he 12millimeters; and of the cranks of the shafts 24 24 be each millimeters.If, for instance, the shaft 24" be actuated, that is, positioned oradjusted, the three millimeters will be transmitted to the end of thelever 32 that is connected therewith, which lever will turn about itsother end; and, inasmuch as: the lever 33 is engaged at the middle ofthe lever 32, lever 33 will,

pivoting on its end that is connected with the shaft 24", turn throughor for half this to the lever 39. This one fourth of a millimeter,reduced by two thirds thereof, will be transmitted to the rack 41,resulting thereby in an effective lift of the frame of 0.08333millimeter, which is one siXtieth of five millimeters, or one twelfth ofone millimeter. The throw of the crank of the shaft 24 produces a liftamounting to two sixtieths of the unit, or to two twelfths (or onesixth) of a millimeter; that of the crank of the shaft 24 efi'ectsa liftamounting to thirty sixtieths of the unit or to thirty twelfths (or twoand one half) millimeters; that of the crank of the shaft 24 results ina lift of fifteen sixtieths of the one third) of a millimeter.

unit or to fifteen twelfths (or one and one quarter) millimeters; thatof the crank of the shaft 24 is transmitted as a lift of eight sixtiethsof the unit or eight twelfths (or two thirds) of a'millimeter; andfinally, that of the shaft 24 produces a lift of four sixtieths of theunit or four twelfths (or In the aggregate, therefore, the throws of thecranks of the six shafts 24 24 24, 24, 24?, 24 effect a lift of sixtysixtiet-hs of the unitor sixty twelfths (or five) millimeters; and thisdistance, as hereinbefore set out, is the displacement of the frame dueto the throw of the crank of the shaft 24 lVithin these limits, therewill be afforded, due to the throws of the cranks of the shafts 24, 24,24, 24, 24, 24, the possibility of shifting the frame any desired numberof these sixtieths of the unit. If, for example, the frame is to begiven a horizontal displacement of forty-eight sixtieths of the unit,the throw of the crank of each of the shafts 24, 24, 24, 24, will haveto be adjusted for this extent of displacement in a manner to behereinafter explained.

It results from the foregoing that the extents of the lifts due to thethrows of the adjusted cranks will be added up on the levers 39, whichmay easily be gathered from the following reasoning: If the cranks ofboth shafts 24, 24*, are set in a down wardly-pointing position, theirstrokes or throws willbe transmitted simultaneously to the lever 33, asboth ends of the lever 32, will be displaced downwards due to thestrokes or throws of the cranks connected therewith. If the throw of thecrank of the shaft 24has also been adjustedat the same time, the fulcrumof the lever 33 will also be displaced downwardly due to the stroke ofthis crank. The stroke of the crank'of the shaft 24 produces adisplacement of the frame amounting to two units or ten millimeters,and, at points in the following description, this crank is designated asthe ten-millimeter crank; therefore, with the effects of all the crankstaken together, a displacement of the frame amounting to four wholeunits will be possible; thus, the throws or strokes of the cranks of thesix shafts 24 24", 24, 24", 24 24, will produce a lift of one unit,the'throw of" the five-millimeter crank of the shaft 24 will effect alift of another unit, and the stroke of the ten-millimeter crank of theshaft 24 will result in a further lift of two units. This method ofshifting the frame offers various advantages, namely, the adjustment ofthe frame will be the most exact one conceivable owing to the multipletransmission of the strokes of the cranks, the wear of the cranks cannothave an appreciable influence on the precision of the adjustment of theframe, which may be divided up in any number of sub-parts of or withregard to a given unit, and the use of brakes is not needed; moreover,the performance of the Work by the controlling mechanism is nearlynoiseless. I

The changing of stitches, in other words,

the determining of the direction of the displacement of the frame (if,in a horizontal direction, whether to the left or to the right,

'or, if in a vertical direction, whether upwards or downwards), will beeffected by an apparatus hereinafter described, which apparatus can acton only the two crank shafts 24 24. Between these two shafts, a sleeve48 is idly mounted and is slidable lengthwise 011 a stationary shaft 47arranged parallel to the same. This sleeve carries two pinions 20, 20(Figs. 1 and 15) spaced, or set at a distance from each other and ofequal diameter, and two shoulder-rings'49, 50, of which ring 49 may beengaged simultaneously with the indentations provided at the peripheryof two stitch-changing-disks 51, 52, located in the same vertical planewith the ring, While ring 50 may be engaged with the indentations of tworeversing disks 58, 54. The disks 51, 52, 53, 54, have each twoindentations 55 diametrically opposite each other (Fig. 8), which, whilethese disks are at rest, are located in a horizontal plane passingthrough their axes. These indentations 55 are intended to prevent, bycooperating with the shoulder-rings 49, 50,

turning of either the two stitch-changing pinions of the stitch-changingdisks 51, 52.

The axial displacement of the sleeve 48 is efiected, iii-exactly thesame manner as is the shifting of the pinions 18, by means of abell-crank lever 56, which engages in an annular groove andis'controlled, as will be explained later on, by the perforatedpattern'strip. On their external sidefaces, the stitch-changing disksandthe reversing disks are-each provided with a pawl 61, 62, 63, 64,which is yieldingly pressed against the periphery of a carrier'cam'57,'58, 59, 60. The carrier-cams 57 58, are-fast .onlthe shaft 24 while thecarrier-cams 59,

60, are fast on the'shaft 24 and are displaced from each other by anangle of 180. In the initial vpositionof the stitch-changing disks andof the corresponding reversing-disks, the pawls 61, 62 (or the pawls 63,64) are in alignment in an axial direction. Each of the shafts 24 ,"24carries, besides'the carrier-cams 57, 59, a fixed ring 65, 66 (Figs. 1,These rings 65, 66 are formed, on their sides that face the pinions 19,21, respectively, with bevelled orsloping clutch jaws or teeth withwhich thesimilar or corresponding-jaws or teeth "67, .68, respectively,ofthe pinions 19, 21, may :become engaged or disengaged, when the latterare shifted axially by means of the bell-crank levers 69, 70,respectively,

. from one end-position to the other.

The adjustment or positioning of:each of the pinions 18,19, 20, 21, iseffected as ,al-

ready described, by a bell-crank lever. All these'bell-crank levers areidly'mounted free to turnon acommon shaft 71 which is located above andparallel with the rack 13 an d engage, by means of theirdownwardly-extending arms andthe slides 25, with the an nulargroovesformed in the'lengthened hubs of the pinions. Each of theotherlaterallyextending arms carries, at its free end, a rotatable eye-bolt72, intothe eye of which is inserted the upper end of'a rod 73, 74,7 5,76, 77,78, 79,80, '81, respectively, (Figs.

1 and 2') The lower ends of the latterrods 'areQhin'gedly connectediwith the laterally projecting arms of the'bell-crank levers 82, 83, 84,85, 86, 87 ,88, 89, -90, respectively,the hubs of which are tubular andare each loosely mounted on a stationary horizontal shaft, and thedownwardly-projecting arms of which are displaced laterally witlrrespectto one another, as may be seen from an mlever 101 (Fig. 11) is, however,fast on the latter shaft, which carries also a lever 103 rigidlyconnected therewith. On the ends of the arms of the levers 100, 101, arepivotally-mounted two platines 104, 105, free to swing up, and down, onpins, and provided with hooks at their free opposed ends, with which ahorizontally slidable double knife 106 of a E shaped cross-sectioncooperates. The corresponding platines (that is to say, the platinescarried by the same lever 100) are connected with a common touchingneedle 107, which is slidable in a vertical direction. These platineslie in or fit into a suitable notch of the needle, so as to swingupwardly and downwardly together with the upstrokes and the down-strokesof the needle whereby at the same time, with their hooks, one moves outof while another comes within the reach of the knife 106. If this knifeis moved from the dotted-line position, of Fig. 10 into the full-lineposition, it will, in the first part of its travel or stroke, carryalong with it the platines that are within its reach and will throw thelevers 100, 101, connected therewith, in a corresponding direction.

The turning of these levers 100, 101, being as a matter of fact apositive movement, and one avoidlng the use of springs, will betransmitted through rods 91, 92, 93, 94, 95, 96, 97, 98, 99, levers 82..83, 84, 85, 86, 87, 88, 89, 90, rods,,73, 74, 75, 76, 77, 78, 79, 80,81, and levers 26, 26, 56, 69, 70, to the pinions 18, 19, 20, 21, whichwill thereby be moved from one end-position to the other. Eachtouching-needle 107 is controlled by a spring 108, which bears, at itslower end, against a guide-plate 109, and, at its upper end, -against ahormentally-disposed pm 110 having both its ends projecting from thesides of the needle; whereby the upward. travel or throw of the needle18 produced. In order to prevent the needle from turning, one end 'ofthe pin 110 extends laterally towards a cross-bar 111 and into avertical guide-slot formed in'a plate 112 mounted fast on the bar 11 1.The touching-needles are reduced or taper, at their upper ends, intoneedlepoints which glide over theperipliery of a jacquard roller113provided, in a manner w'll kn'owni1'i connection with -"ac uardrollers, with rows of holes which cross one another. Around the jacquardroller 113, the patternstrip 114 is laid. The step-bystep movement ofthe jacquard roller is produced, in a well-known manner, as by means ofa ratchet-wheel 115 rotated by the movable pawl 116, (Fig. 2), the lever117 carrying which pawl is attached by means of a link-rod 118 to theswinging arm 119 provided with a friction-roller 120 that bears againsta cam-disk or eccentric 121 keyed to the main-shaft 1. The arm 119 isswung up and down alternately, by the rotation of the cam-disk 121. Thejacquard roller 113 is held locked, during the downward swing, againstaccidental displacement, by means of a tilting-pawl 122 the toe-end ofwhich engages the teeth 123 of a toothed wheel (rigs. 2, 6). The ends ofthe knife 106 travel in slideways or guides 124 (Fig. 10) 3 and theknife is. actuated, by means of a multiple-armed lever 125 mounted idlyand rotatably on the shaft 11. The tubular hub of the lever 125 isprovided with an arm 12? connected, by means of a link 128, with aswinging arm 129 (Fig. 2), provided with a cam-roller 130, which travelsin the camegroove 131 formed in a cam-disk 132 keyed to the mainshaft 1. By this arrange ment of parts, the pivoted arm 129 is swung upand down. The hub of arm 125 is, in addition, provided with anupwardly-projecting cam-segment 133 9) against the irregularcam-surfaceof which rubs a cam-roller mounted on one arm of a twoarmedlever 135 keyed fast to shaft 134. This lever 135 carries mounted uponits other arm, one end of'a bar or plate 136 the other end of which isconnected with a lever 135' fast on the shaft 134. The longitudinal edgeof the plate 136 which is deflected from the shaft 134 engages the pins110 of the touching needles 107 (Fig. 9). The latter will, therefore, bemoved simultaneously oownwards and the points will thereby be withdrawnfrom the holes of the jacquard roller 113 and of the pattern strip 114,when plate 136 is moved or swung downwards, which will be effectedduring the back stroke of the knife 106, by means of the forwardswinging of the cam-segment 133 and the resulting upward travel ormovement of the arm 135 bearing thereagainst on the part thereof havingan increased radius.

In order to adjust the crank-shaft 24 24*, so that the stitch-changingmay occur before the working stroke of the rack 13 (Figs. 1 and 2), thatis, during the idle stroke of the same when moving into the positionrequired for the next stitch, the point of the touching-needle connectedwith the sleeve 48 is bent backwards so as to be in advance, withrespect to the other needles, by the amount of one cross-row of holes inthe pattern strip with regard to its engagement therewith. Moreover, thearrangement of' the reversing of the pinions 18 into their initialposition, that is, from the dotted-line position shown in Fig. 12 to thefull-line position shown therein, will take place. If, for instance, nohole should have been provided, within the pattern strip, for thestitch-changing device, the cranks of the shafts 24 24 would always workfrom above downwards and, they work inversely (that is, from belowupwards), only in case of or connection with the stitch-changing. Aftereach stitch produced with the aid of one of these cranks (that is aftera stitch of at least the size of a unit), the stitchchanging device willfor the next idle stroke of the rack (backwards) cause the cranks to bebroughtagain into their starting position, pointing upwards; and,inversely, is the case if a hole has for the stitch-changing, beenprovided in the pattern strip, for then the cranks will temporarily beturned downwards, during the idle stroke of the rack.

The foregoing will be more clearly eX- plained with reference to thefreely arbitrarily-chosen hole-diagram of the patternstrip shown in Fig.29 and with reference to the Figs. 15 to 28.

In Figs. 16 to 28, the rack 13 is indicated by only a line, and thepinion 20, which meshes therewith, is shown as beingof a larger sizethan the pinion 20.

The reversing disk 53 is represented, for the sake of clearness andconvenience, as being below the Stitch-changing disk 51. In each figure,the illustrated position of the crank is that taken by it at the end ofthe movement of the rack in the direction of the arrow. As the operationof the five-millimeter and ten-millimeter cranks exaetly the same, theten millimeter cranks have been omitted for simplification andclearness. The first row of holes on the left of the pattern diagramrelates to the fivemillimeter cranks, the second row to thestitch-changing. If a hole has been provided in only the first row, thefive millimeter crank concerned will work from above downwardly; if,however, there is a stitch-changing hole besides the hole designed forthe five-millimeter crank, the latter will work from below upwardly.

1st stitch-The initial position of. the stitch-changing device is shownin Figs. 15 and 16. The crank points upwards and the two pawls 61, 62likewise, the shoulder on the cam 57 that co-acts with the pawl 61 isdown and the shoulder on the cam 58 that co-operates with the pawl 62 isup. As, for the first stitch, there is a hole for the fivevmillimetercrank in the pattern-strip, the pinion 19, by means of-the tooth or dog67,

will be engaged with the tooth 65 provided on the crank-shaft 2 1 At theforward stroke of the rack 13, the five-millimeter crank of the shaft 2%will turn clockwise for half a revolution, that is, it will move fromits upperv dead-point position into its lower one (Figs. 16 and 17). As,for the next ing disk and the crank-shaft 245 will there fore turnsimultaneously in directions opposite to each other. At the back-strokeofthe rack, the stitch-changing disk will make an idle half-turnclockwise. The crank will therefore remainpointing downwards (Fig. 18 I2nd Stb tChu-FOI' the five-millimeter crank of the crankshaft 2 1 thereis provided a hole, in the strip; therefore, the jaw 67 will engage withthe jaw 65. At the forward stroke of the rack, the crank will,therefore, rotate through half a turn from its lower into its upperdead-pointposition. As there is no stitch-changing hole for the nextstitch, the pinion 20 is engaged with the reversing diski' 53. This.latter disk will, therefore, make half a revolution counter-clockwise,during the forward-stroke of the rack (Fig. 19). The pinion 20 remainsengaged with the reversing disk 53. At the backwardstroke of the rack,the reversing disk 53 will make an idle half-turn clockwise and thecrzjnk will remain pointing upwards (Fig. 20

3rd and 4th. stitohesrfltt the forwardstroke of the rack, thefive-millimeter crank swings downwardly, the jaw 67 engaging with thejaw 65. The reversing disk 53 turns for half a revolution counter-clockwise, bringing the pawl 62 behind the tooth of the cam 58 (Fig. 21). Atthe back-stroke of-the rack, the pawl 62 will push the cam- 58 alongwith it and will turn the crank so that it will point upwards (Fig.22,).

th stit0h.As there is no hole provided in thepattern-strip for thefive-millimeter crank, the tooth 67 will not be engaged with the tooth65 and, at the forward stroke of the rack, the crank will, therefore,remain in its upperv dead-point position. The reversing disk 53, drivenby the pinion will make an idle turn counter-clockwise (Fig. 23). At theback-stroke of the rack,

the disk 53 will turn again inthe opposite direction, without the cam58, and the crank.

there is again no hole in the pattern-strip.

The tooth 67 remains, therefore, out of en gagement. But the sleeve 48will be displaced by means of the advanced touchingneedle of thestitch-changing device for the seventh stitch and thereby the pinion 20'will be caused to engage with the stitchchanging disk 51 (Fig. At theforward-stroke of the rack 13, the crank will remain pointing upwards;at the next following back-stroke of rack 13, however, the crank will beturned so as to point downwardly, by the pawl 61 and the tooth of thecam 57, for the seventh stitch (Fig. 26).

7th stit0h.This stitch shows, in the pat tern-strip, a hole for thefive-millimeter crank, wherefore the jaw 67 will again be brought intoengagement with the jaw 65, so as to turn the crank upwardly at theforward-stroke of the rack. With this movement, the stitch-changing disk51 will make, with the pawl 61, half a turn to the left (Fig. 27),whereby the pawl 61 is brought so as to lie behind the tooth of the cam57. At the back-stroke of the rack, the pinion 20' will remain engagedwith the stitch-changing disk 51, because, for the next stitch, there isagain a hole for the stitch-chang ing; and the crank will be broughtback again downwardly into its initial position for the stitch-changing.

8th stitch-For this stitch, the same conditions eXist as for the secondstitch (compare Figs. 28 and 17). The eighth stitch is, therefore,produced in the. same manner as the second.

The execution of certain and of all special operations, such asperforating, stippling, and the like, is caused by the sametouching-needles as are, employed for controlling or effecting theoperation of the cranks of the shafts:2al; to 24-. Therefore, with theexception of one, no special lOlL gitudinal rows of holes are providedin the pattern-strip; but the holes that serve to control theseoperations, are located in the same row, as are the holes for theadjusting of the stitches in sixtieths.

With each lug or tooth 28 of the pinions III spectively. The lattershafts surround the shafts 24, 24 24 Each of these pinions marked 140 to140 mesh with the rack 14 and will, when the rack is moved to and fro,be rotated for half a turn clockwise or counter-clockwise (Fig. 2). Thepinions 140 140 140, (see Figs. 1 and 13) are provided on the outer.side face of each with two teeth 142 arranged to engage with two teeth148 provided on the short shaft 144, which receives one end of shaft 24or (as the case may be) of shaft 24 or shaft 24", and which is fitted,outside of the bearing 22, with a crank 145 (not shown in Figs. 1

' and 2 the Josition of rest of these cran s being marked 1 in Fig. 13,and the working pos1t1on thereof being marked H therein. The manner ofconnecting these cranks with the driving mechanism for the special operations of the embroidery machine is not illustrated. The gear wheelsmarked 140 to 140 are shaped in a manner similar to the pinions 18; thehub of each of the pinions 140 140 140 is provided with an annulargroove and with a lug 146, and, on the side face looking downward inFigs. 1 and 14, with a lug 147. The first-named lug co-acts with a lug148 formed 011 the short hollow shaft 141, 141 141, respectively, andthe lug 147 with lug 149 set at an angle of 180, relatively to lug 148.The axial displacement of the pinions 140 140 140, is effected inexactly the same manner as is the displacement of the pinions 140, 140140 from the pinions 18 mounted co-axially or on the same shaft.Moreover, the mode of operation on the hoilow shafts 141 141 141 isexactly the same as it is with the pinions 18 on their correspondingcrank shafts. wherefore, for this arrangement also, the illustrationsgiven in Fig. 12 will be applicable. The cranks 150 of the hollow shafts141, 141 141, serve to control the perforating mechanism of theembroidery machine. They are of unequal length and are each connectedwith the upper end of a link 151 (Fig. 8). The two links on the leftengage, with their lower ends, the ends of the common lever 152 (Fig.3). To the middle portion of this lever, there is connected pivotallyone end of a lever 153, the other end of which is hingedly connected tothe link 15]. on the right of Fig. 3. The lever 153 is attached to a rod154, which is adapted to be connected with the perforating apparatus ofthe embroidering machine. This mode of connecting the control devicewith the perforating apparatus will afford the possibilty of adjustingthe perforating apparatus in seven different positions, each by means ofa single adjustment, or revolution of the machine.

In order to have the cranks of the shafts 24 to 24, 144, and 141 to 141maintained rigidly fast in the upper position, or in the lower position,as the case may be, if some of these parts should be turning withrespect to any part at rest, each of the shafts just named is providedwith a circular disk 155 (Fig. 7) having, in itsperiphery and in theaxial plane of the crank, two curved or bow-shaped recesses 156, each ofwhich is adapted to be engaged by a roller 157 bearing against theperiphery of the disk and mounted on the end of a lens 159 presseddownwardly by a spring 158.

The change or reversal from working with the rack 18 to working with therack 14, and inversely, is effected by means of two bolts 160, 161 whichare spaced from each other and arranged coaxially, as is illustrated forthe rear end-position of these racks, in Figs. 10 and 11. The bolts 160,161, are mounted in the bores of eyes formed in the racks 13, 14, andare slidable therein in an axial direction. From each bolt, a pin 162,163, projects outwardly through a slot 164 formed in the wall of thebore or eye of the corresponding rack. The length of the bolts and theirdistance from each other are so taken, that, for instance, for theoperation of rack 14 (Fig. 11), one end of the bolt 160 will becompletely withdrawn from the bore of the link 12 and its opposite endwill extend out of the. eye of the rack 13 and will become engaged inthe eye formed in the arm 165 that projects upwardly from a sta tionaryhorizontal shaft 166, thus securing the rack 13 against any accidentaldisplacement in a longitudinal direction. One end of the bolt 161,however, extends to the mid dle portion of a hole formed in the link 12and its other end is withdrawn from the hole formed in an arm 167projecting upwardly from the shaft 166. The bolt 161 serves, therefore,as a carrier or coupler between the link 12 and the rack 14, when thelink 12 is moved by the mainshaft in the manner hereinbefore described.All these conditions are reversed, if the rack 13 is tobe moved by thelink 12 through the medium of the bolt 160. The bolt 161 is thenwithdrawn from the link 12 and projects into the middle of the holeformed in the arm 167. On the other hand, the bolt 160 is withdrawn fromthe hole formed in the arm 165 and projects into the hole formed in thelink 12. In the reversed position of, the racks, which is assumed bythem in the rear end-position of the latter, the lower ends of the pins162, 163, engage in the open slots 168, 169, of alengthwise-displaceable slide 170 mounted on the shaft 166. If thisslide is displaced to the right from the position shown in Fig. 11, soas to bear against the arm 167, the two bolts 160, 161, will be carriedalong by the two pins 162, 163 to their other end position, and the bolt160 will enter the hole formed in the link 12 before the bolt 161 leavesthe same. The to-and-fro movement of the slide 170 is produced bythefollowing arrangement of parts, to-wit: To the slide 170, there ispivotally connected one end of alink-rod 171 the other end of which ishingedly fastened l to the free end of an arm-ofthe bell-crank lever172. To the free endof the other arm of the latter, there is pivotallyfastenedthe upper end of-a connecting-rod 178 the lower end of which issimilarly fastened to the roc-kerearm 103 mounted fast on the rockshaft102., Upon the shaftv 102, there is also mounted fast (as hashereinbefore been described) the rocker-arm or lever 101, which co-actswith the outer touching-needle shown on the left of Fig. 6. Ifthistouching-needle sinks into a hole of the patternst-rip, thelowerplatine104 will, atthe next working stroke of the knife pull on thelower end ofthe lever 101, and will thereby turn the shaft 102, so as toswing the arm 103 thereof downwards, which will, bymeans of the parts173, 172, 171, 170, and the. pins 162, 163, push the bolts 160, 161,intothat end position in which the rack 1411s stopped andithe rack13 isc-oupledwith the. link 12.

Should there be no hole provided in the pattern strip for thetouching-needle, the. reversing device will assume the positionillustrated-in Fig. 11,.in which the rack-14is shown coupled-with thelink 12.

In Fig. 4, the manner in which the racks 41, 42, are alternatelythrown'into and out of=gear is diagrammatically shown, in otherwords,the manner of alternately stopping and permitt-in'g the movementof the frame. Each of:the racks 41, 42, is shaped like a frame, in whicha slide-block 174, 175 is provided. The slide-blockl74 isfitted to oneend of a bell crank lever 17 7'fulcrun'ied at-:176 and swung to and froby means ofa cam-disk or eccentric l78'mounted on the main shaft 1. Bythese means, the rat-k42- is swung to and fro andis thereby thrown into.and out of gear witlrthe pinion 46. The slide-block 175 is similarlymoved by means of scam-disk 182, which is mounted on the main shaft 1and agaii'ist which bears one end of a rod 181, the other end of whichis pivotally connected'to a lever 180 fulcrumed at 179. Thecam-disk182-is in such a position with respect to the cam-disk 178 thatthe latter is in advance of the former by about 90. The curves ofthe'two cams 178, 182, are so chosen, that, if the mainshaft revolves-in the direction indicatedby the arrow in Fig. 4, the rack 41 will bethrown into meshwith the pinion 43, shortly before the rack 42 is thrownout of mesh with the pinion 46, and that, later on, the-rack 42 willbethrown again into mesh with the pinion 46 shortly before the rack 41'is thrown out of mesh with the pinion 43 Resulting-from (1) theengagement of therack 42 with pin 37, (2) the 7 employment of thetransmission gears 45,:

46, and a pitch corresponding to theunit of the displacement of theframe, a:

displacement of the rack 44 for more than a unit (that is, for anintegral number thereof) will be compensated, so that the rack 42, aftereach displacement of the frame, will again mesh with the pinion 46. Inorder to simplify the drawings, camdisks have been shown, but, inpractice, grooved disks would preferably be used, so

that the throwing into and out of. ear of the racks 41, 42 would beaffected in a posi tive manner.

In the foregoing, only one half of the automatic mechanism has beendescribed, the other half in Fig. 1 shown as the upper one, is exactlyalike, that is, it is symmetrical with regard to the crank shafts, tothe stitch-change mechanism and the control and operation thereof andwith respect to a vertical, longitudinal and central plane;The-operation of the racks for the vertical displacement of the frame issimilarly effected by the shaft 11 through the intermediary of the lever10 mounted fast on that shaft; the reversal of this rack gear is alsoment for the special operations,'the rack 14- take their rearend-positions, and, furthermore, the knife 106 assumes its forwardend-position. The whole working operation may for greater clearness bedivided into two subordinate or component operations, to-wit: First, theoperation of the parts concerned in the movement of the frame; andsecond, the reversing or, as the case may be, the control of the same,by means of the pattern strip- 1. During the first four sixteenths of arevolutionof the main shaft, the forward stroke of the rack 13 (or 14)takes place and thereby the feed of the frame or the throwing into orout of gear of the mechanisms concerned in special operations, such asperforating and so on. During the fifth sixteenth of a revolution, thethrowing into gearof the frame-stopping racks 42 and 46, will occur.From the sixth sixteenth to the eighth sixteenth, the rack 41 is thrownout of gear, then the back strokes of racks 13, 14, occur, when (if itmay), the operation of the stitch-change mechanism will take place. Fromthe thirteenth sixteenth to the loo fifteenth sixteenth the throwing ofthe rack 41 into mesh with the gear 43 will be effected, while duringthe last sixteenth, the

rack 42 will again be thrown out of mesh.

2. During the first three sixteenths, the knife remains motionless inits forward end-position. I11 the next two sixteenths (the fourth andthe fifth), the back or reverse travel of the knife takes place. Duringthe sixth and seventh sixteenths, the touching-needles will becomedisengaged or withdrawn. From the eigth to the tenth sixteenth, the feedof the jacquard roller 113 is effected. In the next two sixteenths, thefeeling of the touching-needles occurs. And, finally, during theremainder of the revolution, there occur the forward travel of the knifeand, simultaneously therewith, the adjusting of the pinions, that is,the adjustment for the new stitch.

So far as the driving means or parts are concerned, the shaft 24 isactuated in precisely the same way as is the shaft 24 which isparticularly clearly illustrated in and becomes apparent from aninspection of Figs. 1, 2, 8, 15, reference being had to the foregoingdescription. The pinions 19, 21, which are idly mounted on thecrankshafts 24 24 respectively, mesh with the toothed rack 13; and, whenthe latter is shifted back and forth, the pinions 19, 21, are caused torotate in the same direction. If the pinion 19 is not interlocked withthe coupling-ring 65 and the pinion 21 is out of engagement with thecoupling-ring 66, the rotation of the pinions 19, 21, is an idle one ontheir shafts 24 24, and these shafts are not carried along with thepinions in their turning movement. But, if the pinions 19, 21, areclutched to the coupling rings 65, 66, respectively, the shafts 24 24will be caused, by the longitudinal displacement of the rack 13, torotate at the same time and to the same extent and in the samedirection, that is to say, in a clockwise direction. Now it is obviousthat both the crank-shafts 24 24, need not rotate at the same time orremain motionless at the same time, for it may happen. that only one orthe other thereof need be turned. The crank-shaft 24 carries twocam-disks 57, 58, mounted fast thereon and spaced from each other; andthe crank-shaft 24 likewise carries two similarly mounted camdisks 59,60. The cams of the disks 57,58, areset 180 apart, or one in advance ofthe other; and the cams of the disks 59, 60, are similarly positionedwith respect to each other. On the crank-shaft 24 there are idlymounted, between the cam-disks 57 58. a stitch-changing disk 51 and areversingdisk 53; and, between the cam-disks 59, 60, there are idlymounted, on the crank-shaft 24 a stitch-changing disk 52 and areversing-disk 54. Each of these stitch-changing disks 51, 52, andreversingdisks 53, 54, is provided, on its outer end-face, with acarrier-pawl 61, 62, 63, 64, which co-acts with one of the cam-disks 57,58, 59, 60, and serves to turn the same in a clockwise direction, asillustrated in Figs. 1, 8, 15,- and 16 to 28, both inclusive. The otherlateral face of each of the disks 51, 52, 53, 54, is provided with alaterally-projecting, annular, toothed flange. As is shown in Fig. 15,the toothed flange of'the disk 51 extends towards the toothed flangethat projects from the opposite face of the reversingdisk 53; and theflanges of the disks 52, 54, are similarly arranged; On a stationaryshaft 47, arranged between the crankshafts, there is mounted, free to bedisplaced axially along the shaft 47 a sleeve shaft 48. Fixed upon thelatter is a gear 20, which remains, during the lengthwise shiftings ofthe sleeve-shaft 48, constantly in mesh with the toothed rack 13. (Fig.1.5). Also fixedly mounted on the sleeveshaft 48, there are twostop-rings 49, 50, and, between the same, a pinion 20. This pinion 20meshes with either the toothed flangesof the two stitch-changing disks51, 52, or those of the two reversing disks 53, 54. If the pinion 20'meshes with the two stitch-changing disks 51, 52, through their toothedflanges, these disks 51, 52, will be rotated back and forth by theback-andforth rotation of the sleeve-shaft 48 (upon which the pinion 20is mounted fast) due to the back-and-forth lengthwise displacements ofthe toothed rack 13 transmitted, through the pinion 20, to thesleeve-shaft 48. The direction of rotation of the disks 51, 52, will bethe same, for the pinion 20 moves oppositely atthe meshing points (orpoints of engagement) with the disks 51, 52; and, since the drivingpoints of the latter are displaced from each other 180 and therefore lieopposite to each other, it

follows again that these stitch-changing disks 51, 52, must likewiserotate in the same direction. Because the carrier-pawls 61, 63, he inthe same direction, with respect to the direction of rotation, theyactuate the carrier-cams 57, 59, in the same direction and thereby drivethe crank-shafts 24 24*, likewise in the same direction. When the pinion20 meshes-with the stitchchanging disks 51, 52, the reversing-disks 53,54, are locked against rotation through the engagement of the stop-ring50 in therecesses 55 of these reversing-disks. versely, thestitch-changing disks will be held against rotation on the crank-shafts24 24, when the pinion 20 meshes with the reversing-disks53, 54, withrespect to the propulsion of which the hereinbeforedescribed mode ofoperation of the actuating mechanism of the disks 51, 52, exactlyapplies. From the foregoingeit is In- I clear that the driving of thecrank-shaft .24 and its direction of rotation are exactly I Claims:

1. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous vertical and horizontal displacements of theframe which jointly determine the shifting thereof are, for each stitch,controlled by means of holes formed in a pattern-strip, said mechanismincluding a frame-actuating rack; a lever attached thereto; a series ofcranks having different arm-lengths and adjustable, independently of oneanother in two positions opposite one to the other, each crank beingcapable of producing a displacement of the rack corresponding to thethrow of the crank; and a series of two-armed levers which connect thecranks with the first-named lever and transmit thereto the throws of thecranks.

2. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous Vertical and horizontal displacements of theframe which jointly determine the shifting thereof are, for each stitch,controlled by means of holes formed in a pattern-strip, said mechanismincluding a rack; a lever attached thereto; a series of cranks havingdifferent arm-lengths and adjustable, independently of one another intwo positions oppositeone to theotheri, eachcrank being capable ofproducing a displacement of the rack corresponding to the throw of thecrank; a series of twoarmed levers by which the first-named lever isconnected to the cranks, and mechanism for transmitting to, the framethe aggregate of the throws of the cranks in substantially reducedamount.

An automatic operating mechanism for embroidery'machines, of the type inwhich the simultaneous vertical and horizontal displacements of theframe which jointly determine the shifting thereof are, for each stitch,controlled by means of holes formed in a pattern-strip, said mechanismincluding a frame-actuating rack; a lever attached thereto; a series ofcranks having different arm-lengths and adjustable, independently of oneanother in two positions opposite one to the other, each crank beingcapable of producing a displacement of the rack corresponding to thethrow of the crank; a series of two-armed levers which connect thecranks with the first-named lever and transmit thereto the throws of thecranks; pinions for actuating the cranks; a pair of carriers for each ofthe pinions, said carriers cooperating therewith to rotate the cranksthrough a partial turn; a reciprocating rack common to the pinions fordriving the same; and a set of levers controlled by the pattern-stripfor displacing the pinions axially to such an extent that the pinion isbrought within working reach of one of the pair of carriers that co-actwith the pinion and rotate in the same direction as the latter to bringthe cranks into one or the other of producing a displacement of the rackcorresponding to the throw of the crank; a series of two-armed leverswhich connect the cranks with the first-named lever and transmit theretothe throws of the cranks; pinions for actuating the cranks; means fordriving the pinions; a set of levers for effecting axial displacement ofthe pinions; touching needles cooperating with said set of'levers; aplurality of pairs of platines; two-armed levers through theintermediary of which and the platines said set of levers and thetouching needles are connected; a reciprocating knife having a constantstroke and arranged to be engaged by the platines one of each pair ofwhich is adapted to engage the knife from below while the other isadapted to engage the same from above,

one platine coming within reach of the knife in one end-position of itsrespective touching-needle and the other platine coming within reach ofthe knife in the other end position of its touching-needle, theresulting displacement of the pinions in both axial directions beingpositive.

5. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous vertical and horizontal displacements of theframe which jointly determine the shifting thereof are, for each stitch,controlled by means of holes formed in a pattern-strip, said mechanismincluding a fran1eactuating rack; a lever attached thereto; a series ofcranks having different arm-lengths and adjustable, independently of oneanother, in two positions opposite one to the other, each crank beingcapable of producing a displacement of the rack corresponding to thethrow of the crank; 21- series of two-armed levers which connect thecranks with the first-named lever and transmit thereto the throws of thecranks; a crank-shaft for eachof the cranks; a plurality of pairs ofpinions, each pair of which pinions is mounted, side by side, on one ofI the crank-shafts and free to turn idly thereon and is adapted to beconnected with its respective crank; a ratchet-gear device for each ofthe crank-shafts, for actuating the same to bring the crank into oneposition by means of one of the pairs: of pinions and into an oppositeposition by means of the other of the pairs of pinions in order that,during the succeeding working stroke, the frame may be moved in one oftwo opposite directions; a step-by-step feed roller; touching needlesone of which engages the feedroller in advance of the others; and anaxially-displaceable train'of' gears common to a pair of the pinions fordriving the latter and arranged to be axially displaced by the touchingneedle that preengages the feed-roller.

6. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous vertical and horizontal dis-.

i a frame-actuating rack; a lever attached thereto; a series of crankshaving different arm-lengths and ad ustable, independently of oneanother, in two positions opposite one to the other, each crank beingcapable of producing a displacement of the rack corresponding to thethrow of the crank; a series of two-armed levers which connect thecranks with the first-named lever and transmit thereto the throws of thecranks; a

5 stitch-changing mechanism arranged to cooperate with a pair of cranksadjacent to each other and adapted to co-act with an end of thefirst-mentioned lever; and a pinion that is arranged between thelast-named cranks and that cooperates therewith.

7. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous vertical and horizontal displacements of theframe which jointly determine the shifting thereof are, for each stitch,controlled by means of holes formed in a pattern-strip, said mechanismincluding a frame-actuating rack; a pinion adapted to mesh therewith atwo-armed lever attached to the rack; a series of cranks havingdifferent arm-lengths and adjustable, independently of one another intwo positions opposite one tothe other, each crank being capable ofproducing a displacement of the rack corresponding to the throw of thecrank; a series of two- (armed levers which connect the cranks with thefirst-named lever and transmit thereto the throws of the cranks,

ed with the frame and in mesh with the transmission gear and having apitch corresponding with the shortest stroke acting on the frame andproduced by one of the cranks that are connected with the stitchchanginggear and by one of the two racks first-named, which racks: are adaptedto be thrown into and out of mesh with their respective pinions so as tothrow one rack i into gear before the other is thrown out of gear. o

8. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous vertical and horizontal displacements of theframe which jointly determine the shifting thereof are, for each stitch,controlled by means of holes formed in a pattern-strip, said mechanismincluding a frame-actuating rack; a lever attached thereto;crank-shafts; a series of cranks thereon having different arm-lengthsand adjustable, independly of one another, in two positions opposite oneto the other, each crank being capable of producing a displace ment ofthe rack corresponding to the throw of the crank; a series of two-armedlevers which connect the cranks with the firstnamed lever and transmitthereto the throws of the cranks; pinions for actuating the cranks;another pinion which is mounted on a crank-shaft and is axiallydisplaceable thereon and is driven independently of the first-namedpinions and is coupled therewith in an axial direction; a hollow shaftarranged to be connected operatively with the embroidery machine andloosely mounted on the crank-shaft; and touching needles for controllingthe pinions.

9. An automatic operating mechanism for embroidery machines, of the typein which the simultaneous horizontal and vertical displacements of thefram which jointly determine the shifting thereof are, for each stitch,controlled by'means of holes formed in a pattern-strip, said mechanismincluding a frame-actuating rack; a lever attached thereto; crank-shaft;a series of cranks thereon having different arm-lengths and adjustable,independently of one another in two positions opposite one to the other,each crank being capable of producing a displacement of the rackcorresponding to the throw of the crank; a series of two-armedleverswhich connect the cranks with the first-named lever and transmit theretothe throws of the cranks; pinions for actuating the cranks; secondpinions mounted free to be displaced axially on part of the crankshaftsand. driven independently of the first-named pinions and coupledtherewith for each stitch, controlled by means of holes formed in apattern-strip, said mechanism including a rack; a frame-actuating lever;a series of cranks thereon having different arm-lengths and adjustable,independently of one another in two positions opposite one to the other,each crank being capable of producing a displacement of the rackcorresponding to the throw of the crank; a series of two-armed leverswhich connect the cranks with the first-named lever and transmit=theretothe throws of the cranks; pinions that are in mesh with the rack andthat operate the cranks; other pinions mounted free to be displacedaxially on part of the crank-shafts; a secondrackfor actuating thelastnamed pinions; a link arranged to reciprocate with a constant stroke andprojec-tinginto-the space between the racks;

fixed members formed with openings; a pair of carrier-bolts for couplingthe racks with the link and arranged transversely to the path oftheracks'and 'coaxially one to the other and adapted to project in thereversing position of the racks into the openings of said fixed members;a touching needle; and a slide. arranged to move crosswise to the pathof the racks and to be'operated by th wtouching needle for axiallydisplacing the carrier-bolts so as to connect one bolt at one end withone of theracks and at the other end with the link, and the other boltwith the other rack and with one of the fixed members, in order to haveonly one of the racks slidable and to maintain theother rack inreversing position.

11. An automatic operating mechanism for embroideryimachines of the typein which the simultaneous vertical and horizontal displacements of theframe which jointly determine the shifting thereof are,

for each stitch, controlled by means of holes formed in a pattern-strip,said mechanism including a frame-actuating rack; a'lever attachedthereto; crank-shafts; a series of cranks. thereon having differentarmlengths and adjustable, independently of one another, in twopositions opposite one to the other, each crank being capable ofproducing a displacement of the rack corresponding to the throw of thecrank; a series of two-armed levers which connect the cranks with thefirst-named lever and transmit thereto the throws of the cranks; aplurality of hollow shafts carried by the crank-shafts; cranks ofunequal length operatively connected with the hollow shafts;-

- OTTO FAHRNI. \Vitnesses Fmnnmorr NEREZELI, FRIEDRICH MoNINGs.

